Definitions for "Omnidirectional"
A type of microphone which takes in sound coming from all directions.
Literally, from all directions. In audio, microphones are said to be omnidirectional if they can detect sound with equal sensitivity from all directions. Speakers are omnidirectional if they produce sound pressure level that is the same without regard to the position of the listener vis a vis the axis of the driver or port; this tends to be the case with subwoofers and low frequency drivers. Low frequencies, in general, tend to be omni-directional, unlike high frequencies, where directionality increases with frequency.
A microphone pickup pattern which is non-directional. An omnidirectional pickup pattern would look like a sphere with the microphone at the center.
Keywords:  scanner, orientation, bar, read, codes
Bar codes which scanners can read from many orientations.
Bar codes read in any orientation relative to the scanner.
a symbol that can be read regardless of orientation to a given plane.
Normally a stick-like aerial that provides 360 degree coverage. see Aerials, connectors and cable.